/Engine/Plugins/Animation/RigLogic/Source/RigLogicLib/Public/dna/layers/MachineLearnedBehaviorWriter.h
The neural network storage will be implicitly resized (if needed) to provide storage for the new data.
void setNeuralNetworkLayerActivationFunctionParameters ( std::uint16_t netIndex, std::uint16_t layerIndex, const float * activationFunctionParameters, std::uint16_t count )